I went to watch the southern regional in Spartanburg which was our R.P.I. and Randy Weiss won it and he is on track staff. He used a rule,sheer havoc, crash, and a freak a zoid.  I have seen him use the sheer havoc and crash on all the patterns they are his favorite balls.  He was using the crash mostly in his last match if I rember correctly.  Sorry but I didn't see how his balls were laid out , but he was playing a very direct line to the pocket not down an in but a very tight small arch shot.  Hope this little bit of info can help you at your RPI.
--------------------
I should just quit bowling, oh wait I already tried that.
Now that I am back and my Saws are sharp again, I am ready to cut some wood.